Formaldehyde → Benzene, ethenyl-, polymer with 1,3-butadiene

HRID 486182Notes

Reaction equation

HRID 486182 reaction equation
C(OC(=O)C)(=O)C.[Na].[CH:9]1[C:18]2[C:13](=[CH:14][CH:15]=CC=2)[CH:12]=[CH:11][C:10]=1S(O)(=O)=O.C=O.[OH-].[K+]>O>[CH2:18]=[CH:9][CH:10]=[CH2:11].[CH2:15]=[CH:14][C:13]1[CH:18]=[CH:9][CH:10]=[CH:11][CH:12]=1

Participants

7

Reactant 5

HCID 712FormaldehydeHCID 7918Acetic AnhydrideHCID 84202-Naphthalenesulfonic acidHCID 14797Potassium HydroxideHCID 5360545Sodium

Product 1

HCID 62697Benzene, ethenyl-, polymer with 1,3-butadiene

Reagents, catalysts & solvents 1

HCID 962WaterSolvent3×

Procedure

14.7 kg of Latex A-1, 3.21 kg of deionized water are charged into a 40 l reactor equipped with a stirrer, heating and cooling apparatus, and a raw material supplying tube. Then, 126 g of acetic anhydride and 3.1 kg of deionized water are added and mixed at 25° C. After stirring and mixing for about 1 minute, the mixture is allowed to stand for 30 minutes. Then, 90 g of the sodium salt of a condensate of beta-naphthalene sulfonic acid and formaldehyde; 180 g of potassium hydroxide and 1.5 kg of deionized water are added, while stirring. A butadiene/styrene copolymer rubber latex with an average particle size of 0.65 μm is obtained. The pH of the latex is 7.2 and the solid content is 27.3%.

Workup

  1. customequipped with a stirrer
  2. temperatureheating
  3. temperaturecooling apparatus
  4. additionmixed at 25° C
  5. additionmixing for about 1 minute
  6. stirringwhile stirring

Sources & evidence

ORD record
ord-54d04ba5e4b247ee8250d2f676809ea4
Source dataset
uspto-grants-1994_03
Patent number
US05290867

Reaction notes

Loading…